Grain separator



*July 14, 1936.

c:t c. INGRAHAM v 2,047,508

` GRAIN SEPARATOR .Filed Aug. 7; 1955 s sheeis-sheet 1 l 172119. j A 58July 14, 1936. c. c. INGRAHAM GRAIN SEPARATOR Filed Aug. 7, 1935 3SheetSheet 2 July 14,' 1936- c. c. INGRAHAM 2,047,508

GRAIN SEPARATOR Filed Aug. 7, 1933 3 sheets-sheet 3 K o /0 o 5 /4 ZZ 9,//5

drum herein referred to or -that.,mays;bel em Patented July 14, 1936PiefreNfr oasi-ee* My invention provides fanfimprovedimachineforapparatus-for l thef: separation;T of 2 d iierent kinds of grain'andfor-the separationr-therefrom oil-smalle: seedsa Generallyfstated: the:inventiomconsists iof thenovel devices; :combinations:of\-.de,vices-.fand arrangement .fof :parts ihereinatter-edescribed;tandak f, Y dened in..thetclsaiirnssil 4 n y It is thought:vtnat` the combinationvfor" relativa-e; cooperative construction-:and.,Larrangementtot;` Y the several.. separatingf:instrurnentaltiessv willfsbesi, made' salient by thefollowing@introduotorydisma cussion. of therelative merits,-f,foi::somewhatidif ferent. kinds of separation, yof -pocketed .l erwin-`dented separating discs and pocketed or indentede.',` separatingldrums.,.. 1 Y y l l As illustrative` of .1 the? .type of ,separating,dises-1: herein referred to, attention is calleditoithfeiCarff. terPatent :Nov 1,364,247.of;`.-Janua1;y 4i .1921; fands: as illustrative of.the ,generahtype ofilseparatin played, attentioniscalledztoithelwjolsness Baten-t N01.'1,625008,0f"Aprlvl91927r Y In the`indented.. drum..or. cyllrlder,v.,centrifuga1t forceplays a greatenpartinimakingsthe separa.- V-

Because of .this fact,V thereareertinlseparatinsit WhiclLcan be moreeiectively'madegbyi one om. the' other of the twoprinciplesrlaccording'ttovae` rious factors, suoli ,as whatlthe'materixa.ls`;mza.r and Whatseparation may beidsiredg.

To. illustrate this' point; we. miglitznaka corne'. parison intheseparation. off,."c'ertairtmaterials;It@h mayV be desired to separate'.oa'ts 1and barleyfrml;. wheat; and' We will, say thatlthewhatisjir'ntlile;M majority as to"quantity. Experience hasishown s that, afdisc separator with 'pockets ,0L-a .size.`suit= able 'for` theseparation4 willmake' a .more accurate. if( separation ofith'eWheat'from.th oatsandlbarly than can be' done by WanI indentedcylindnrnae. chine. The kernels of grain. aremoradiitlicg measured bythe pockets' of the discs, and the' kernels of barley 4and-oats,beinglonger.. than the wheat kernels,` are not pickedupby'the'-poclrets4 of the discs.`

If the same separation of" thissame'materiaiisf" attempted 'by-meansof-an=lndented le'ylixiderh-v' ingl pockets f ocomparable sizei-f-itwlllffbeefound-l; that-f more' barleyr fke'rnels will 2be @liftedifbyi-itli indented cylinderN pockets anddiseharged with the: wheatkernels @than wasithewaserinlthe disc' separator.v The-pocketsof:'thefindntedcylndemz" do :not rmeasure g as f; accuratelje asrtoiflengtli. e Because fof these..characteristicsf irre'theetwedifferent; systems,. eachr systemtrhassadxantages over.: themther incertaixrfseparationsmiusteasfaw indentedcylin'der rwill not-makeas.-close.a 'lengthH f separation asthedisc :separator but, asmentioned-l, y above; :inta particular finstance would tendto lift imore barley infzthepookets ratherthan reject it withitheoats, it .ismorefadaptablefon making-a ,v5 separation, of oats from..barley,uConsequently,V it I is ndingimore and more-favor in barleycleaningi,roperations-,particularly in t the', malting industry, Tostateitbriely.indented cylinders .willlmake a more [complete separation of oatsfromsbarleyr l0 than Wil-[discr separatcrseven 4though there. maynot bea very great difference in the .length of the,

Atwo varieties of "grain By the same token, inx

dented cylinders will' not make as completelsepfj ara-tion` of barleyfrom Wheat as Will'disc sepa- 15' 4?? ratorsrn Neither will v they make"as complete a;

separation'of-small seedsV from Wheat or from" barley'onoats-as will-disoseparatorsr Ir'sspeakingof the-'iseparationfoi fine seedsfrom-grains bythe-twoInethodsgweshouldcmene" 2e if Y tion v`tlatfa more"precise-measuring method is ree4 quiredfetlian'inwthe separation of; for`insta-nce; barley-fandioats; and Vthis exactitudedmmeasure ing-'-tliesizes` of I thev seedsand' `grain vkernels is-"- more effectively doneby the discs ltl1an-by-the-25 :.-e

cylinders;IV Experience has shown that-'disc' sep-j aratorslwil'lmore-effectively separa-te grai'ns'thancylinders in "practically everyrequired separation witirr thevexception of that of barley and oatsin fwhichrseparationethe indented-cylinders seem1tol-30 1 excel.

Tcrrill'nstratef110Wv axcombination machine. of` f rtl'1is;-1.kindtmight.rbe.oflmore'valuez-in; thezicleaningcx of ya-riousgrains zthanweithereadisc-r separator z or ar-eylinder. .-separator,l lWe rmay lconsiderIasma?" a country; elevator. .Let ,us sayfthat there, willbef. requiredthe cleaning of .hard spring ,wheat, ree. movingvitherefrom,oats,.wld...oats, barley; alsa.:

smalllweedlseeds, such. as Wild buckwheat..ball 40 l whioli-'areeto'beremovedf suchas barley'andioatsr The durum wheat willal-so-oontain-tsmall'weed f seedsswh-ich willliavertofbe removed'.I

Let 'itabe lassumed lthatth'e 'machine-Pis alsoto barley, oats as Wellasfsmall weedsseeds.: In the first requirement;.mentionedethatiofcleaningstheehardzsprin-g? wheat-aadisc separators, willarlbeaentirelyisuitablegnandi ino fact: excel imi-ifi' quality vof work anyotheremachineenowsion;thea

35 if: lchineesuchasfl have: here `,illustrated for usez-:inp

either the hard spring wheat or the durum wheat,

experience has shown that the discs make the separation much moreeiciently than cylinders, both from the standpoint of the cleanliness ofthe Wheat and from the standpoint of the less waste of small wheat withthe weed seed dockage.

In mentioning the small seed separation from grains, it might be well toremark on the diculty found in attempting to remove small round seedsfrom grains by means of cylinders. Round seeds such as ball mustard andwild peas cannot beas effectively removed by cylinders as by discsbecause of the fact that the round seeds tend to roll out of theindented cylinder pockets be' fore being carried high enough to bedischarged into the trough. This difficulty is not encountered in thedisc method as the undercut pocket of the disc holds the round seed andcarries it up to be discharged with the ne screenings.

To go on with the illustration respecting a country elevator machine, wewill say that in the attempted cleaning of barley on this machine astraight disc separator, if the machine were such, would not make a goodclean-cut separation of the oats from the barley, and it would be foundthat too large a quantity of barley would pass off with the oats. Thiswould naturally happen inasmuch as a disc separator fitted with discsfor country elevator work would, as has been shown, reject barley fromwheat better than a cylinder machine would do. It is only logical,therefore, that it would reject barley with the oats when cleaningbarley.

The cylinder, on the other hand, while not doing as well on cleaningwheat, will when it comes to cleaning barley, excel the work of the discseparator because of its ability to remove oats from the barley withoutthe loss of much barley.

In my improved machine, I have combined pocketed discs and pocketeddrums or cylinders in such way that the two types of the pocketedseparating devices simultaneously perform the functions for which theyare best adapted. The pocketed discs are arranged in groups with thepockets of the discs of different groups of such size as to accomplishdifferent kinds of grades of separation; means is provided fordelivering to certain of the groups of pocketed discs, that part of thegrain that can best be separated by` such drums; and these severalinstrumentalities together with their driving mechanisms, andcooperating elements, are combined in a complete or self-containedmachine.

In the accompanying drawings, which illustrate sheet metal housing I0.

this housing is divided into several compartments.

' on the line 6-6 of Fig. 1; and

Fig. 7 is a transverse vertical section taken on the line 'I-'I of Fig.2.

In this commercial form of the improved machine illustrated in thedrawings, the several separating elements and immediately co-operatingparts are shown as mounted within a rectangular The upper portion of towit: as shown, into three separating compartments I I, I Ia and IIh bymeans of transverse vertical partitions I2 and I3. The commingled stockto be separated is delivered to the compartment II through a suitablespout I4 that delivers directly into a distributing hopper I5 that isopen at its bottom and, as shown, extends from end to end of thecompartment l I. A spiral distributing conveyor I6 is arranged to workin the distributing hopper'l 5 immediately above the open bottomthereof. This conveyor I6 is shown as carried by a long shaft I'Iextended completely through the housing IIJ and provided at one end witha sprocket I8.

Extended longitudinally and completely through the housing III, andjournaled in suitable bearings thereon and on the partitions I2 and I3,is a shaft I9 shown as provided at the head end of the machine with asprocket 20 and at its rear end With a beveled gear 2|. In thispreferred form of the machine the shaft I9 carries three groups ofpocketed separating discs 22, 22a and 22h, the said groups of discsbeing located, respectively, in the compartments II, IIa and IIb. Thepockets in these discs are preferably formed substantially asillustrated in my prior Patent No. 1,665,549 of April 10, 1928. However,the pockets in the discs 22 are larger than the pockets in the discs 22aand the pockets in the discs 22a are larger than the pockets in thediscs 22h. In pracnected to hub structures by radial spokes equippedwith beveled propelling blades or surfaces 23.

. The discs, in the arrangement illustrated. will be driven in acounter-clockwise direction, in respect to Figs. 5, 6 and 7; and the camblades on the spokes of the discs 22 are beveled in a direction topropel, the stock in a direction from left toward the right, in respectto Fig. l, whereas the 1 fcam blades on the'spokes of the discs 22a and22b arebeveled in a direction to cause the stock to move from righttoward the left, in respect to Fig. l, as will hereinafter more clearlyappear.

The separating compartments I I, II3 and IIb aiimbaa;

are-:providedfz withli hopper-like .bottomsirZIlQlZdeet andlv24b:.th`at;affordsgrain containers throught-fi which .theilowerp'ortionsof th'e respectiveediscssy on the housing Iii andcarrieslspiral Conveyors 3 I, 3 I .a and .3 Ib arranged..i tobworkf,.respectively-,2 in the catch.tr'ouglfis25f,.l2landd25;A Shafti isdrivenvin a directionto'causethespiral.cone veyors 3i r and vilaitofeed.thestockor.- grainsv in ar direction fromright toward thef left,-vin..rev spect to Fig..2. As shown, the spiralconveyorslf 3i and 3 I2lhave a left#hand trendor thread While-"1 the conveyor 3 I*O hasaright-hand trend or thread'H so that the latter will.force-triegrain-deliveredA into pocket. 25b not -only' toward. the`discharge-i... spout 36e, but toward` theelevatorf-pocket -28,l causinga certain. amount of grain'.to.bere-HY delivered to elevator 33.1'-

The elevator pockets 26land 28-`are formed'alike,-. f see Figi, andarearranged to directthelstock"; respectively, into the hop-pers 24aand.Y 24h. Shaftif 3%] within thepockets 26 and-'28*is .providedlwi-thpaddle-acting elevator 'blades 32; andi 331` which;l under rotation ofshaft 30'in thedirectonof... the varrow marked onfFig. 7, lwill'lift thestock Y and crowd the sameinto the-.communicating'-fL hopper.

The separating compartment II is provided 'at its front endwithfanoverflowdischargeY spout-` V34, see Figs. l and 5'; thevseparating"compex-t-vv ment II@ -at .its delivery end,tofwit:'atthe-fpare-y tition I3, is provided with an overflowdischarge." spout 35, see'Figs. l and 2; *and"thefseparatingYcompartment IIb at its ldelivery end, to' wit: ati4 the rear endV of thehousing 1H);Jis.provided. with:

an overilow discharge spout 36;1 see Fig. 1.

The overflow dischargespout34f is arranged.. to deliver to one or moreseparating drumsr In' thev preferred arrangement :for `co-operationIwithzr the group of discs 22, I have provided two su'chri` drums. Thesedrums orY cylinders 31 'are located.'l in the lower portionofthe-housing I -just below the hoppers-or containers 24, 24a. and 24band are set infrearwardly inclined-positions... These. drums, byvrneansof spider-like heads, are secured to and rotated witha shaft .38.suitablyjou-rna-ledf at its ends in bearings on the endsofithehousing.. Iii. On its inner surface, thedrum 3'I`is formed with pocketsor indentations 39. These pockets and also the pockets of the abovedescribed. discs. are, of course, closely positioned on, the entireseparating surface of the said drums and discs.

Within the drums the shafts38 carry spiral conf veyors 4! that work innon-rotary catchtroughs- 4i. lThese troughs lare loosely-'hung on rotaryshaft 33and are shown as provided with projecting sleeves 42, see Fig.1,`capable of being lock-ed or held against rotation With respect to theshafts. 38 and drums 31.

Catch troughiib has a discharge spouto'ri'open-I-- ing 36a. f

The spout 34'at' thev junction z of itsqdeliveryy;v branches, Yas shown,is providedlwithrapivotedfi gate 34adapted.to seset.toproperlyfdistributei` rows. marked ffoni' the several. viewsfthe1;1grain\;to.'.the resp'ectvesbran'chesf-zand: hence 1' to thefrespective; cylinders :for fdrumsz;

Fon deliveryfromzthe overowspout 34fsimul=f taneouslystotthe:two-ifdrumsasaid spout 3431s giros;

deliver fdirecctlydntozthezreceiving ends ,of therez-n spectiveidrums. l

Shaftseiraregftdriven. through:l intermeshingz: bevel gears. A431`.fronrfa .transverse f. shaft .44; see',A i Figs'al .andzc'i onIthefrearfendoffthe ihcusing: I Gaf.: Shaft Mfzalsos;

respectivelyfopposite.l the :pockets 26 'andi28iaref-.20 shownasrprovidedi witlficircumferentially `spaced lifting-. flights.'-581that .assist inf carrying. :the Lgraifrom.'saidffpocketsiinto=the1containers 24a an'dsZd Alisprocketchainfiiiiruns' over the `'sprocketJZ on .disc'ffshaft I9and'over-theisprocket I8Jon the distributor `shaft I 1, Another I sprocket chain152i` runsfuover. a. large. sprocket 531on `shaft I9.' andi" over asmaller sprocket 54 on conveyor shaft 30..

The' driving# connections i described.; f while'they may; of lfcourse,lbel' vari-edi, serveA tof drive the. severV eral :running parts' ofi themachine.v in'wthev direc-2. tions indicated lor in thedirections of theyarV With the` drivingi.4 connections` illustrated-*power V"will" beshowirfasapplied to vthe projecting end of--the`V` upper transverse'shaft 48. 1 y

As best-i sh'owrr in: Figf.- A1,` rthe lowerends ofV thieelowereendsof-flth'e troughs 4I vdeliver to discharge =40 spouts 51'. i

Operation As'thef rstrillustration :of `v`the operationroithe machine:weiassurnefrthat `the incorningrstream. of145 stock-.to'bei`separatedlzconsists chiefly of. wheatf commingled '.with 1*1iore4 orless oats,Y wild'f-oats, possibly:somebarleyand small-seeds-such asball, mustard; wild 1 peas; .-wild buokwheatt and cockie-.wv

Thisp.commingledfj,stream` will" be delivered-15ML journaled l.einsuitable hearings: 451.10

willf'be pickedffup, carried over, and under. tlreo In the. use of the.machineillustrated-,fi-"I fhaveff.:

.obtainecttheebest resultsawithithe.separating discss drivenapproximately sixty R. P. M` and the cylinders driven at approximately56 R. P. M. Y

The main body of wheat commingled with the small seeds, such as noted,will, as stated, be delivered into the catch trough 25. This commingledmaterial by the feed screw 3| to be delivered into the pocket 26 and bythe paddleacting elevator 32 will be delivered into the secondcontaining hopper 242". By the pockets of the second group of discs 22aall of the small seeds and small materials, such as broken wheat andsmall wheat, will be lifted, carried over and delivered into the catchtrough 25YL while the clean wheat will be tailed over and dischargedfrom the machine through the spout 35. The small seeds and broken andsmall wheat and the like delivered into the catch trough 25a will, bythe feed screw 3|, be delivered into the pocket 28 and by thepaddle-acting elevator 33, will be discharged into the third containinghopper 241. By the relatively small pockets of the discs 22b the smallseeds Will be lifted, carried over and discharged into the catch trough25b and ultimately discharged through spout 3&1n while the largermaterials, such as very small kernels of whole wheat and larger portionsof broken wheat, will be tailed over and discharged through spout 36.

In the actions above described the stock in the ilrst containing hopper24 Will be continuously fed or worked toward the right, in respect toFig. 2, that is toward the spout 34, by the propelling blades 23 of thediscs 22 and at the same time, the stock in the containing hoppers 24aand 24b will be continuously fed or worked toward the left, in respectto Fig. 2, by the propelling blades of the discs 22a and 22h. Byreference to Fig. 6 it will be noted that the grain or stock in thecontaining hoppers will be at an altitude above the bottoms of the largeopenings in the discs so that the progressive feed of the stocktherethrough is made possible.

By combining the pocketed drums with the discs, it is made feasible anddesirable to crowd the stock contained in the Wheat as the major seedthrough the rst separating compartment at a very high speed, therebyobtaining high capacity. This crowding of the commingled stock throughthe rst separating compartment and past the iirst group of pocketeddiscs, very greatly increases the capacity of the machine. It makespossible the removal of all of the relatively long grain and seed suchas oats, wild oats, and barley from the Wheat and Small seeds, but willresult in carrying to the drums more or less wheat, which, however, maybe readily and rapidly separated from the longer grains such as abovenoted.

In the use of the machine for separating cornmingled stock consistingchiefly of barley mixed with oats, wild oats, small amount of wheat andsmall seeds, such as buckwheat and cockle, the separating action will beas follows: The major part of the barley and all of the small seeds willbe lifted by the rst set of discs 22 and will be delivered to the secondset of discs by separating actions already described, while all of theoats and larger barley, if any, will be tailed over and delivered to theseparating drums,

By each drum the mixture received thereby will be discharged in twostreams, to wit: the oats will be tailed over and delivered throughspout 56 while the wheat separated from thev oats by the drums will bedischarged from the machine through the spouts 51.

From the foregoing it is evident that the sev-I.

instrumentalities are assembled in a self-contained machine wherein thediscs and the drum or drurns are driven at the proper predeterminedrelative speeds necessary for eflicient separating actions, for example,with the driving connections designed substantially as shown, the drumswill be driven at the proper speed to take care of the commingled seedsor grains delivered thereto from theseparating discs and the said discswill be driven at the proper relative speed to effect their severalseparations.

It will be understood that in the use of this machine it will be thecommon practice to remove from the commingled stock not only the strawand chaff and large foreign particles, but also the light dust and whichoperations may be accomplished by well known or any suitable scalpingand aspirating devices.

From the foregoing it will also be understood that the commercialmachine illustrated is capable of various modifications within the scopeof the invention defined in the appended claims.

In this improved machine, I have co-operatively arranged two classes ofseparating devices, to wit: pocketed discs and pocketed drums orcylinders with co-operating devices and connections whereby the oneclass of separating elements rst performs its function and then deliversthe partly separated stock to the second class of separating devices,thereby relieving the latter from a large part of the work ofseparation. While the two classes of separations are performed insequence, both classes of separating elements, to wit: the discs and thedrums, operate continuously and simultaneously and the respectiveclasses of separations are properly proportionate as between the discand the drum or drums.

By combining the drum or drums with the several groups of discs havingpockets of diierent size for different classes of separations, it ismade feasible to perform the major separations by the discs and to causethe drum or drums to perform very efciently the function for which theyare best adapted, such as the separation of oats from barley.

The above described arrangement produces a machine of capacity farbeyond that of either discs alone or drums alone. Moreover, the saidelements are naturally and conveniently combined into a self-containedmachine of very high capacity in respect to cost and space occupied.

What I claim is:

lr. In a grain separator, a hopper-like container having an overflowconduit for tailings and having a catch trough at one side thereof, of aplurality Vof pocketed separating discs working in said container andadapted to pick up and deliver into said catch trough small seeds andrelatively short grains such as wheat and to reject long grains such asoats and barley, an internally pocketed drum located adjacent said discsand container, the latter having an overflow spout for deliveringdirectly into one end of said drum, the pockets of said drum beingconstructed and adapted to 70 reject long grains such as oats, but topick up and carry over shorter grains, means co-operating with said drumfor maintaining separation of the grains picked up and the grainsrejected by the pockets of said drum, and driving connections for 75simultaneously rotating said discs and drum, whereby the said discs anddrum simultaneously and continuously perform their different separatingactions.

2. In a grain separator first and second hopperlike grain containers,first and second groups of pocketed discs working, respectively, in saidgrain containers, means for delivering commingled stock to the firstcontainer, the discs of the first group having pockets that are largerthan the pockets of the second group, means whereby grain and seedspicked up by the discs o-f said first group will be delivered to saidsecond container and subjected to the discs of the second group, aninternally pocketed separating drum located below said discs andcontainers, said first noted container having an overflow conduitleading to one end of said separating drum, means for maintaining theseparation effected by the discs of said second group, means formaintaining the separation effected by 4the pockets of said drum, anddriving connections for simultaneously rotating said two groups of discsand said drum, whereby the several classes of separation will besimultaneously and continuously carried out.

3. The structure defined in claim 2 in further combination with a thirdhopper-like container, a third group of separating discs rotatable inunison with said first and second groups of discs and having pocketssmaller than the pockets of the second group, and means for maintainingthe separation effected by said third group of discs.

4. The structure defined in claim 2 in which there are two separatingdrums and co-operating elements, such as above defined, and in which theoverflow from said first container is simultaneously delivered to bothof sai-d rotary drums, the said second drum being driven simultaneouslywith said first noted drum and said separating discs.

5. In a grain separator, first and second hopperlike containers, firstand second groups of pocketed discs working respectivelyv in said graincontainers, the second set of discs having pockets that are smaller thanthe pockets of the first set of discs, a distributing hopper for thefirst container extending along one side of the rst group of discs, saidfirst container having an overflow conduit at one end and a catch troughat one side of the set of discs, a bafiie extended below one end portionof said distributing hopper for causing the grain to bank up andmaintain an approximate upper surface level in said container, means fordelivering from said catch trough the grain picked up by the first groupof discs and for delivering the same to the said second container, thelatter having an overflow conduit for the tailings, and means forcatching the grain elevated by the second group of discs and deliveringthe same from said second container. 1

6. In a self-contained machine for the separation of grain and likecommingled stock, groups of pocketed separating discs and an internallypocketed separating drum, combined with stockcontaining and separationmaintaining devices, said groups of discs and drum having pocketsdiffering in character or design and' thereby adapted to receive andcarry from commingled stock different shapes or sizes thereof, meansfeeding the commingled stock first to certain of said groups of pocketeddiscs, said certain groups of pocketed discs having pockets larger thanthe remaining groups and serving to classify said stock for delivery tosaid remaining groups of discs and to said separating drum, and meansfor simultaneously rotating said groups of discs and drum whereby theconsecutive separating operations are simultaneously and continuouslycarried out.

7. In a machine of the class described, first and second sets ofpocketed separating discs and a pocketed separating drum, constitutingthree separating devices, the pockets of said drum differing from thoseof said discs and the pockets of the two discs differing the one setfrom the other, and thereby adapted to receive and carry from thecommingled stock different shapes and sizes thereof, means for feedingthe commingled stock rst to one of said three sets of separating devicesand for maintaining the separation effected thereby, and means fordelivering the stock separations effected by the rst receiving set ofseparating devices, the one class thereof to said drumand the other tothe other or second receiving set of discs, and means for maintainingthe separations effected by said drum and second receiving set of discs,said feeding means being arranged to deliver stock into the interior ofsaid drum so that the separations effected therein will be influenced bycentrifugal force due to rotation of said drum.

8. In a machine of the class described, first and second sets ofpocketed separating discs and an internally pocketed separating drum,the pockets of said drum and second set of discs differing from those ofthe first set of discs and thereby adapted to receive and carry from thecommingled stock different shapes and sizes thereof, means for firstfeeding the commingled stock to said first set of discs and formaintaining the separations effected thereby, means for delivering thestock separations effected by said first disc, the one class thereof tosaid second set of discs, and the other class to said drum, and meansfor maintaining the separation effected by said drum and second set ofdiscs, said feeding means being arranged to deliver stock into theinterior of said drum so that the separations effected therein will beinenced by centrifugal force due to rotation of said drum.

9. The structure defined in claim 6 in which the stock containing andlseparation maintaining devices include a catch trough within said drumand a trough-like container in which said discs work, said trough-likecontainer having one edge over which the stock carried over by the discswill be delivered out of said containers.

l0.. The structure defined in claim 8 in which the means for maintainingthe separations effected by said drum and discs includes a catch troughWithin said drum and a trough-like container in which said discs work,said trough-like container having one edge over which the stock carriedover by the discs will be'delivered out of said containers.

CHARLES C. INGRAHAM.

